Effect of Laser Shock Peening on the Stress Corrosion Cracking of 304L Stainless Steel

Yoo, Young-Ran; Choi, Seung-Heon; Kim, Young-Sik

doi:10.3390/met13030516

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…As is presented distinctly in Figure 9(a) and (b), when the friction ball is loaded to 30 N, the untreated sample is badly worn in comparison with that of 10 N. After the wear process, the sample surface appears much micro cracks in the contact region. These cracks gradually propagate under the repetitive shear stress, ultimately resulting in the fracture of sample and giving rise to the delamination phenomenon (Yoo et al, 2023). The delamination could be regarded as a result of plastic deformation on the worn surface (Tekdir and Yetim, 2021).…”

Section: Analysis Of Wear Mechanismmentioning

confidence: 99%

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Li,

Liu,

Zhang

et al. 2024

ILT

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Purpose The purpose of this paper is to investigate the effect of laser peening (LP) on mechanical and wear properties of 304 stainless steel sheet. Design/methodology/approach Three-dimensional morphology, micro-hardness and micro-structure of shocked samples were tested. The wear amount, wear track morphology and wear mechanism were also characterized under dry sliding wear using Al2O3 ceramics ball. Findings The LP treatment generates deformation twins that contribute to the grain refinement and hardness increase. The wear test displays that the wear mechanism of samples is mainly abrasive wear and oxidation wear at 10 N load. While at 30 N, the delamination and adhesion areas of treated sample are reduced visibly compared to untreated ones. Originality/value This study specifically investigates the mechanical and wear properties of 304 stainless steel after the direct action of LP on its surface, which shows an effective improvement on the wear resistance. For example, the wear loss of processed sample is reduced by 19% at 30 N, the friction coefficient decreases from 0.4714 to 0.4308 and the groove depth is reduced from 78.1 to 74.4 µm under same condition. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2024-0007/

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Section: Analysis Of Wear Mechanismmentioning

confidence: 99%

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Li,

Liu,

Zhang

et al. 2024

ILT

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“…In addition, due to the defects promoted by the uneven heating upon the welding itself, residual stress inevitably exists near the weld. As a germination factor causing pitting corrosion, residual stress will rapidly expand into cracks in harsh environments, enhancing the SCC sensitivity of the pipeline steel [ 22 , 23 , 24 , 25 ]. Additionally, similar point corrosion (SCC) caused by residual stress and its derivative cracks was also found in the failed pipelines.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Ji,

Zheng,

Qin

et al. 2024

Materials

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The corrosion process under the complex safe-end feedwater line conditions was investigated via experimental lab testing and numerical simulation. The corrosion of safe-end feedwater lines was controlled through the combination of galvanic corrosion, residual stress, and flow velocity. Firstly, galvanic corrosion occurred once the 20 steel was welded with 316L stainless steel. The pitting corrosion could be observed on the 20 steel side of the weld joint. Secondly, a vortex flow was detected around the welding bump and within the pits. The growth of the pits was accelerated in both the vertical and horizontal directions. Finally, under the residual stress condition, the stress intensity factor (K) at the bottom of the pits was easier to reach than the critical stress intensity factor (KISCC). Then, pitting was transformed into stress corrosion cracking which then propagated along the weld line. Therefore, the critical factor inducing the failure of safe-end feedwater lines was the combined action of galvanic corrosion, residual stress, and flow velocity.

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“…Laser shock processing (LSP) in 304 SS caused severe grain refinement and formation of SCC-resistant deformation twins, improving SCC resistance. Moreover, the compressive stress generated on the 304SS surface due to LSP provided additional resistance to SCC [24]. Another SCC mitigation approach is to apply a cold-spray coating of similar composition material on the fusion welded area where high tensile residual stress is anticipated.…”

Section: Introductionmentioning

confidence: 99%

Chloride-Induced Stress Corrosion Cracking of Friction Stir-Welded 304L Stainless Steel: Effect of Microstructure and Temperature

Naskar,

Bhattacharyya,

Jana

et al. 2024

Crystals

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Dry storage canisters of used nuclear fuels are fabricated using SUS 304L stainless steel. Chloride-induced stress corrosion cracking (CISCC) is one of the major failure modes of dry storage canisters. The cracked canisters can be repaired by friction stir welding (FSW), a low-heat input ‘solid-phase’ welding process. It is important to evaluate the ClSCC resistance of the friction stir welded material. Stress corrosion cracking (SCC) studies were carried out on mill-annealed base materials and friction stir welded 304L stainless U-bend specimens in 3.5% NaCl + 5 N H2SO4 solution at room temperature and boiling MgCl2 solution at 155 °C. The engineering stress on the outer fiber of the FSW U-bend specimen was ~60% higher than that of the base metal (BM). In spite of the higher stress level of the FSW, both materials (FSW and BM) showed almost similar SCC failure times in the two different test solutions. The SCC occurred in the thermo-mechanically affected zone (TMAZ) of the FSW specimens in the 3.5% NaCl + 5 N H2SO4 solution at room temperature, while the stirred zone (SZ) was relatively crack-free. The failure occurred at the stirred zone when tested in the boiling MgCl2 solution. Hydrogen reduction was the cathodic reaction in the boiling MgCl2 solution, which promoted hydrogen-assisted cracking of the heavily deformed stirred zone. The emergence of the slip step followed by passive film rupture and dissolution of the slip step could be the SCC events in the 3.5% NaCl + 5 N H2SO4 solution at room temperature. However, the slip step height was not sufficient to cause passivity breakdown in the fine-grained SZ. Therefore, the SCC occurred in the partially recrystallized softer TMAZ. Overall, the friction-stirred 304L showed higher tolerance to ClSCC than the 304L base metal.

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Effect of Laser Shock Peening on the Stress Corrosion Cracking of 304L Stainless Steel

Cited by 9 publications

References 39 publications

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Chloride-Induced Stress Corrosion Cracking of Friction Stir-Welded 304L Stainless Steel: Effect of Microstructure and Temperature

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